public  class SequenceNumber {
      /*  private static ThreadLocal<Integer> seqNum = new ThreadLocal<Integer>() {
        public Integer initialValue() {
            return 0;
        };

        public int getNextNum() {
            seqNum.set(seqNum.get() + 1);
            return seqNum.get();
        };

        public static void main(String[] args) {
            SequenceNumber sn = new SequenceNumber();
            TestClient t1 = new TestClient(sn);
            TestClient t2 = new TestClient(sn);
            TestClient t3 = new TestClient(sn);
            t1.start();
            t2.start();
            t3.start();
        }

        private static class TestClient extends Thread {
            private SequenceNumber sn;

            public TestClient(SequenceNumber sn) {
                this.sn = sn;
            }

            public void run() {

                for (int i = 0; i < 3; i++) {
                    System.out.println(" thread [" + Thread.currentThread().getName() +
                            " ] s n [ " + sn.getNextNum() + " ] ");
                }
            }
        }
    }*/
}